It's not as if there aren't meme-heavy right-wing subreddits who do something similar. r/the_donald was all over the front page for a long while, and has a notoriously strict moderation policy. It's just that the right wing subs just don't happen to be as popular right now - or they get banned for lack of moderation and for having their members advocating extreme violence (like r/physicalremoval).

latestagecapitalism's output is relatively tame, and given that they have a politically contentious subject matter, heavy moderation is necessary in order to keep the subreddit free of people from any part of the spectrum who'd turn it into a monkey-flinging shitfest.

Also, it's nowhere near the front page today; it's nothing on what r/The_Donald used to be like.